Endocrinology is a medical specialty that deals with the diagnosis and treatment of disorders of the endocrine system, which consists of glands that produce and secrete hormones. Hormones are chemical messengers that regulate various functions and processes in the body, such as metabolism, growth, development, reproduction, mood, and stress. Endocrine disorders can affect any organ or system in the body and can cause various symptoms and complications. Some of the common endocrine disorders are diabetes, thyroid diseases, adrenal diseases, pituitary diseases, osteoporosis, and polycystic ovary syndrome.